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% Text Node
\draw (42,139) node [scale=0.8] [align=left] {原始数据};
% Text Node
\draw (145,140) node [scale=0.8] [align=left] {底层特征};
% Text Node
\draw (260,140) node [scale=0.8] [align=left] {中层特征};
% Text Node
\draw (370,140) node [scale=0.8] [align=left] {高层特征};
% Text Node
\draw (465,140) node [scale=0.8] [align=left] {预测};
% Text Node
\draw (544,140) node [scale=0.8] [align=left] {结果};
% Text Node
\draw (266,180) node [scale=0.8] [align=left] {表示学习};
% Text Node
\draw (266,209) node [scale=0.8] [align=left] {深度学习};


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